go/test/intcvt.go

// $G $D/$F.go && $L $F.$A && ./$A.out

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

const (
	ci8 = -1<<7;
	ci16 = -1<<15 + 100;
	ci32 = -1<<31 + 100000;
	ci64 = -1<<63 + 10000000001;
	
	cu8 = 1<<8 - 1;
	cu16 = 1<<16 - 1234;
	cu32 = 1<<32 - 1234567;
	cu64 = 1<<64 - 1234567890123;

	cf32 = 1e8 + 0.5;
	cf64 = -1e8 + 0.5;
)

var (
	i8 int8 = ci8;
	i16 int16 = ci16;
	i32 int32 = ci32;
	i64 int64 = ci64;

	u8 uint8 = cu8;
	u16 uint16 = cu16;
	u32 uint32 = cu32;
	u64 uint64 = cu64;
	
//	f32 float32 = 1e8 + 0.5;
//	f64 float64 = -1e8 + 0.5;
)

func chki8(i, v int8) { if i != v { panicln(i, "!=", v) } }
func chki16(i, v int16) { if i != v { panicln(i, "!=", v) } }
func chki32(i, v int32) { if i != v { panicln(i, "!=", v) } }
func chki64(i, v int64) { if i != v { panicln(i, "!=", v) } }
func chku8(i, v uint8) { if i != v { panicln(i, "!=", v) } }
func chku16(i, v uint16) { if i != v { panicln(i, "!=", v) } }
func chku32(i, v uint32) { if i != v { panicln(i, "!=", v) } }
func chku64(i, v uint64) { if i != v { panicln(i, "!=", v) } }
//func chkf32(f, v float32) { if f != v { panicln(f, "!=", v) } }
//func chkf64(f, v float64) { if f != v { panicln(f, "!=", v) } }

func main()
{
	chki8(int8(i8), ci8 & 0xff - 1<<8);
	chki8(int8(i16), ci16 & 0xff);
	chki8(int8(i32), ci32 & 0xff - 1<<8);
	chki8(int8(i64), ci64 & 0xff);
	chki8(int8(u8), cu8 & 0xff - 1<<8);
	chki8(int8(u16), cu16 & 0xff);
	chki8(int8(u32), cu32 & 0xff);
	chki8(int8(u64), cu64 & 0xff);
//	chki8(int8(f32), 0);
//	chki8(int8(f64), 0);

	chki16(int16(i8), ci8 & 0xffff - 1<<16);
	chki16(int16(i16), ci16 & 0xffff - 1<<16);
	chki16(int16(i32), ci32 & 0xffff - 1<<16);
	chki16(int16(i64), ci64 & 0xffff - 1<<16);
	chki16(int16(u8), cu8 & 0xffff);
	chki16(int16(u16), cu16 & 0xffff - 1<<16);
	chki16(int16(u32), cu32 & 0xffff);
	chki16(int16(u64), cu64 & 0xffff - 1<<16);
//	chki16(int16(f32), 0);
//	chki16(int16(f64), 0);

	chki32(int32(i8), ci8 & 0xffffffff - 1<<32);
	chki32(int32(i16), ci16 & 0xffffffff - 1<<32);
	chki32(int32(i32), ci32 & 0xffffffff - 1<<32);
	chki32(int32(i64), ci64 & 0xffffffff);
	chki32(int32(u8), cu8 & 0xffffffff);
	chki32(int32(u16), cu16 & 0xffffffff);
	chki32(int32(u32), cu32 & 0xffffffff - 1<<32);
	chki32(int32(u64), cu64 & 0xffffffff - 1<<32);
//	chki32(int32(f32), 0);
//	chki32(int32(f64), 0);

	chki64(int64(i8), ci8 & 0xffffffffffffffff - 1<<64);
	chki64(int64(i16), ci16 & 0xffffffffffffffff - 1<<64);
	chki64(int64(i32), ci32 & 0xffffffffffffffff - 1<<64);
	chki64(int64(i64), ci64 & 0xffffffffffffffff - 1<<64);
	chki64(int64(u8), cu8 & 0xffffffffffffffff);
	chki64(int64(u16), cu16 & 0xffffffffffffffff);
	chki64(int64(u32), cu32 & 0xffffffffffffffff);
	chki64(int64(u64), cu64 & 0xffffffffffffffff - 1<<64);
//	chki64(int64(f32), 0);
//	chki64(int64(f64), 0);


	chku8(uint8(i8), ci8 & 0xff);
	chku8(uint8(i16), ci16 & 0xff);
	chku8(uint8(i32), ci32 & 0xff);
	chku8(uint8(i64), ci64 & 0xff);
	chku8(uint8(u8), cu8 & 0xff);
	chku8(uint8(u16), cu16 & 0xff);
	chku8(uint8(u32), cu32 & 0xff);
	chku8(uint8(u64), cu64 & 0xff);
//	chku8(uint8(f32), 0);
//	chku8(uint8(f64), 0);

	chku16(uint16(i8), ci8 & 0xffff);
	chku16(uint16(i16), ci16 & 0xffff);
	chku16(uint16(i32), ci32 & 0xffff);
	chku16(uint16(i64), ci64 & 0xffff);
	chku16(uint16(u8), cu8 & 0xffff);
	chku16(uint16(u16), cu16 & 0xffff);
	chku16(uint16(u32), cu32 & 0xffff);
	chku16(uint16(u64), cu64 & 0xffff);
//	chku16(uint16(f32), 0);
//	chku16(uint16(f64), 0);

	chku32(uint32(i8), ci8 & 0xffffffff);
	chku32(uint32(i16), ci16 & 0xffffffff);
	chku32(uint32(i32), ci32 & 0xffffffff);
	chku32(uint32(i64), ci64 & 0xffffffff);
	chku32(uint32(u8), cu8 & 0xffffffff);
	chku32(uint32(u16), cu16 & 0xffffffff);
	chku32(uint32(u32), cu32 & 0xffffffff);
	chku32(uint32(u64), cu64 & 0xffffffff);
//	chku32(uint32(f32), 0);
//	chku32(uint32(f64), 0);

	chku64(uint64(i8), ci8 & 0xffffffffffffffff);
	chku64(uint64(i16), ci16 & 0xffffffffffffffff);
	chku64(uint64(i32), ci32 & 0xffffffffffffffff);
	chku64(uint64(i64), ci64 & 0xffffffffffffffff);
	chku64(uint64(u8), cu8 & 0xffffffffffffffff);
	chku64(uint64(u16), cu16 & 0xffffffffffffffff);
	chku64(uint64(u32), cu32 & 0xffffffffffffffff);
	chku64(uint64(u64), cu64 & 0xffffffffffffffff);
//	chku64(uint64(f32), 0);
//	chku64(uint64(f64), 0);
}